Rail-grinding machine



Aug. 12, 1930. #5 QUA ET AL 1 772,636

RAIL GRINbING MACHINE Filed Nov. 15, 1926' 4 Shegts-Sheet I Aug. 12,1930. F, L, RE UA ET AL 1,772,636

I RAIL GRINDING MACHINE IIIIIA'IIIIIIIIII IIIIII'IIJIIIII 4 Sheets-Sheet3 Aug. 12, 1930'. F. L. RE QUA E AL RAIL GRINDING MACHINE Ffiled Nov.15, 1926 v mf I TTORIEYS IN YEN TIJRS ream-ma. 1 z: awq

MN IN/01%? Aug. 12, 1930. F -RE UAEML I 1,772,636,

RAIL GRINDING MACHINE.

Filed Now-15, 1926 4 Sheets-Sheet 4 y 7 IIIIIIIII// I Igxgl 143 as J: 4043 6 INVEIl-TUILS I trio/inns PatentedAug. 12, 1930 UNITED STATES PATENTOFFICE I I I ION S. KALENBORN F REDWOOD BEDERICK L. RE QUA OF SANFRANCISCO, AND AR F CITY CALIFORNIA, ASSIGNOR '10 WELDING SERVICE INC,OF SAN FRANCISCO,

CALIFORNIA, A CORPORATION OF CALIFORNIA BAIL-GRINDING MACHINEApplication filed November 15, 1926. Serial No. 148,449.

' I I v to ma- This inventlon relates generally chines for surfacing orgrindlng rails of ra lt cks. T he Zlectrical arc method of welding railshas now come into general use .on both electrical and steam railroads.

weld however leaves a roughened surface,-

r us necessitating the use of suitable ap aiiitus for resurfacing therails. 'For t is N purpose it has been proposed to employ a portablegrinding machlne mounted upon a truck. These machines generally comprisea single grinding wheel ad1ustab y p upon the truck and driven by an eectr c mo}; tor through a universal connection. Suc

machines have not been sat sfactory becauge of the inadequacy of thegrinding wheel a I 1e ts and because the use of a sing v i iiid i ii gwheel necessitates bodily turning he truck around before the other railcan be round. Furthermore, the drive connect on etweenth'e motor andwheel make such machines complicated and expensive to manufacture.

It an ob'ect of this invention to devise a rail grindiiig machine whichneed not be.

(1 from the track to grind both rails.

l t i s a further object of th1s mvent1on to generally improve upon theadyustments for controlling the grinding wheel of a rail grinding,machine, thereby, ncreaslng its operating efliciency.

other 0b v deg'isd a iiovel forn i of drive for the grindingwheels of arail surfacing machinewh ch will incorporate "a motor having a grindingwheel mounted directly upon each end of its F lii'therobjects of-thisinvention will appear from the following descript on in whlch wehave setforth the preferred embodiment of our invention. It is to be understoodthat the invention is to be accorded a range of mechanical andelectrical equivalents consistent with the state of the prior art.

Referringto the drawings: 1 Figure 1 is aplan View of a rail grlndlngmachine incorporating the principles of this invention.

An electrical the line 4-4 of Fig. 3.

the construction of one o mounted ect of this invention to Fig. 2 is atransverse cross sectional view of the locking mechanism for theshiftable" m'otor carriage. Flg. t 1s a cross sectional Fi 5 is a crosssectionalview taken along the hue 5-5 of Fig. 1

Fig. 6 is across sectional detail view taken alongthe line 6-6 of Fi 1and showing %the roller bearin s for the shiftable motor carriage.

ig. 7 is a cross sectional view taken along the line-7-7 of Fig. 6.

Fig. Sis a cross sectional detail illustrating the construction of theadjustable mounting of the motor upon the motor carriage.

F i 9 is a cross sectional detail taken along the line 9-9 of Fig. 8.

Fig. 10 is a cross sectional detail taken along the line 10-10of Fig. 1,I

' Fig. 11 is a cross sectional view taken along the line 1-1-11 of Fig.5.

The invention comprises generally a wheeled frame or truck which isadapted to support a grinder motor in such a manner that themotor maybeshifted bodily transversely of the frame. The motor is provided with adouble ended shaft and a grinder wheel is directly mounted upon each endso that by shifting the motorone wheel may be made to operate upon onerail and upon shiftable in a vertical direction by providinganadjustable mounting-for the motor, upon the shiftable carriage. Thislatter adjustment 'is preferably provided with a manual controldesignated so that the position of the grinding wheels with respect tothe rails of a track maybe adjusted from eitherside of the machine. Tofacilitate accurate positioning of the grinder wheels the shiftablecarriage is preferably mounted upon rollers soas to move withsubstantiallv no friction- 'Alock view taken along L ing device isprovided for fixing the carriage with respect to the frame when it isdesired to remove the machine from the track.

The specific embodiment of the invention which we have illustrated inthe drawing comprises a frame 10 supported by means of wheels 11', thewheels being adapted to fit that'gauge of track with which the machineis intended to operate. The frame has been shown as consisting of a pairof end members 12 connected together at their ends by a pair of archedside members 13. The end tudinalmembers 17 interconnected by a pair oftransverse brace members 18.

r The ends of the longitudinal carriage members 17 are adapted to engageand track upon the frame members 12 and are preferably provided withroller bearings to reduce friction to a minimum. Thus-referring to Figs.6 and 7, each end of the longitudinal carriage members 17 is shown asprovided with an extension 20 adapted to overlie a frame member 12. Aroller bearing is mounted upon this extension 20, the bearing in thisinstance comprising a roller shell 21 positioned upon the axle 22,rollers 23 being interposed between the shell 21 and the axle. The innerside of the frame members 12 are also engaged by rollers, the rollerassemblies in this instance however being adjustable to permit taking upside play in the carriage. One of these roller assemblies is shown inFig. 10 and comprises a roller shell 25 disosed upon a suitable shaft26, rollers 27 bemg interposed between the shell and shaft. For securingadjustment of the roller, shaft 26 extends eccentrically from one end ofa cylindrical block 28, this block being seated within oneof thelongitudinal carriage members 17 Block 28 may be locked in any desiredadjusted position by means of a wedgeshaped locking pin or bolt '29, oneend of this bolt being threaded to receive a nut 30 for jaming the boltinto engagement with block 28.

The bottom sides of the frame members 12 are also preferably engaged byrollers mounted upon the transverse carriage members 17. In thisinstance the rollers are likewise adjustable and, as shown in Fig. 11,comprise a roller shell 32 disposed upon a shaft 33, this shaftextending eccentrically from the cylindrical block 34. Rollers 35 areinterposed between the roller shell 32 and the shaft 33.

The cylindrical block 34 is adj ustably'locked in position by means oflocking pin or bolt 36. I or adjustably mounting the motor to theshiftable carriage there is provided a pair of duplicate devicesengaging the ends of the motor housing and which in operation areoperated simultaneously. Each of these devices preferably comprises avertically disposed screw 38 threaded within a nut 39 which is seated inone of the longitudinal carriage members 17. Upon the lower end of thescrew. 38 suitable means is provided for attachment to the motorhousing. For-exam.-

ple, there is shown a V-block 40 adapted to engage an end portion 41 ofthe motor housing, this V-block being secured to the screw 38 by meansof a-suitable thrust bearing assembly 42. The U-shaped bolts 43 serve toclamp the motor housing portion 41 up against the \V-block 40. The upperendof the screw 38 is provided with a non-circular portion 44 to whichisfixed a hand wheel 46 or other suitable manual control means.

In order to rotate the screws 38 in synchronism and thus maintain themotor shaft horizontal at all times, there is provided a positive driveconnection between the two screws. This drive connection has been shownas comprising a pair of sprockets 48 fixed to the screws 38 and aboutwhich is entrained the sprocket chain 49. Thus by rotation of either ofthe hand wheels 46 both screws 38 are ro tated to raise or lower themotor relative to the carriage. In order to brace the screws 38 againsttension exerted by the sprocket chain 49 there is provided anintermediate bar 50 having its ends suitably journaled upon the' atewithin vertical slides. Thus each of the longitudinal carriage members17 is provided with a pair of spaced guide members which have tongues 56adapted to engage within' slots 57 provided upon opposite'sides of eachof the .V-blocks40.

As previously explained, the two grinder wheels are employed and thesewheels are mounted directly upon the motor shaft. Thus the motorshaft 60is extended at both ends and directly secured thereto are the grinderwheels 61. The upper portion of each wheel is preferably inclosed by asuitable guard 62 mounted upon the extended housing portion 41 andcarrying a suitable hand hold 63. Be-

.the rails.

, With devices of this kind it is frequently necessary to remove themachine from the track. For this purpose the carriage-is provided with apair of spaced hars extending through lugs 66 provided upon thetransverse carriage members 18. In order to lock" the carriage withrespect to the frame while the machine is being moved, there is provideda pair of locking levers 67 pivotally secured to one of the frame bars12 as'by means of the pivot pin 68. These leverscarry fingers 69, whichwhen the levers are turned to the dotted line position shown in Fig. 4,extend adjacent opposite sides of one ofthe extensions 20. For retainingthe levers in either looking or an out-of-the-way position they arelongitudinally slidable upon the pin.

68 and are provided with inner cam faces 70 engaging the ends of pin 71.Springs 72 serve to urge the levers in a direction to engage the camfaces 7 O with the relatively stationary pin 71,-these cam faces servingto retain the leversin either one of the two positions.

In. operating this machine, after a weld has been made upon one or bothof the rails, the machine is arranged so that two of the wheels 11straddle one of the welded spots. The operator the grasps the nearesthand wheel 46 and the corresponding hand hold63, and by rotation of thehand wheel raises or lowers the motor shaft'; un ti l the adjacgttransversely of said frame.

2. A- rail grinder comprising .a wheeled ily shifting the motor frameadapted to operate upon a railed track,

a motor mounted transversely of said frame, said motor having a shaftextending from both ends of the same, a grinding wheel mounted upon eachend of said shaft, means for bodilyshifting said motor transversely ofsaid frame, and means for vertically adjusting the position of saidmotor with re spect to said track.

3. A rail grinder comprisinga wheeled frame adapted to engage a railedtrack, a transversely shiftable carriage mounted upon saidframe, a motormounted upon said carriage, means for vertically adjusting the motorwith respect to the frame, said motor,

having a shaft arranged transversely of the frame, and a grinding wheelmounted direct ly upon said shaft.

4. A rail grinder comprising a wheeled I frame adapted to engage atrack,a' carriage mounted upon said frame and adapted to be shiftedtransversely of the same, a motor mounted upon the underside of saidcarriage, said motor having a shaft extending transversely of the frameand extended at both ends of the motor, a grinding wheel mounteddirectly upon each extended end of the shaft, and means for bodilyadjusting the vertical positionof the motor while maintaining thetransverse relationship of the shaft.

5. A rail grinder comprising a wheeled frame adapted to engage a track,a carriage mounted upon said frame and adapted to be shiftedtransversely of the same. a motor grind wheel ot'ope'fats 115011 thesurface offiuounted up e nders deo said carriage,

the rail. By rolling the machine along the track the grind wheel may bem oved longitudinally of the rails and by shifting the carriage thewheel may be moved transversely ofthe rails. By manipulation of thehandwheel. 46 the sides of the rail may also be ground against the? faces ofthe grinding wheel. When one rail has been finished it is only necessaryfor the operator to move about to the other side of the machine and thengrind the other rail with the other wheel.

The freely shiftable carriage: and the roller mounting for the samemakes possible coniplet'e' oontrol' over movement of the grinding wheeland thus an operatorcan complete a given number of grinding operations.in ,a

. minimum of time.

We claim:'

1 A rail grindercomprising. a wheeled frame adapted to operate upon arailed track, a motor mounted transversely of said frame, said motorhaving a shaft extending from both ends of the same, a grinding wheelmounted upon each end of said shaft, the distance between the centers ofsaid grinding wheels being substantially different than the gauge ofsaid track, and means for bodbodily adjusting the vertical position ofthe motor,

6. A rail grinder comprising'a wheeled frame, a carriage mounted uponsaid frame,-

said carriage being sliiftable transversely of the frame, a motor havinga shaft extending from both ends of the same, a grinding wheelmounteddirectly upon each extension of the shaft, a separate adjustablemounting for securing each end of the motor to the underside of thecarriage, and means for effecting simultaneous adjustment of saidmountings. 7. A rall grinder comprising a wheeled frame, a carriagemounted upon said frame,

said carriage being shiftable transversely of .the frame, a motor havinga shaft extending from both ends of the same. a grinding wheel mounteddirectly upon each extension of the shaft, a separate adjustablemounting-for securing each end-of the motor to the underside of. thecarriage, a separate manual conupon each end of said shaft, the distancebetween the centers of said wheels bein substantially different from thegauge 0 said wheeled frame, and means'for operably adjusting the motorand grind wheels in a vertical direction relative to the rails of atrack to be ground.

9. A rail rinder comprising a wheeled frame adapte to operate upon arailed track,

a transversely shiftable carriage mounted upon said frame, means.engageable by an operator from either sideof said frame for shiftingsaid carriageda motor carried by said carriage, a pair of grind wheelscarried by said carr1age,sa1d grind wheels being arranged one ad acenteach side of the carriage, means forming a driving connection betweensaidmotor and both said grind wheels, said 80 rind wheels beingshiftable-laterally of the tically adjustin each .grind wheel withrerame with said carriage, and means for verspect to the trac 10. A railgrinder comprising a wheeled frame adapted to operate upon a railedtrack, a horizontal transverse drive shaft, a trans.- versely shiftablecarriage supporting said drive shaft upon said frame, means foreffecting vertical adjustment of said shaft,

said means serving to retain said shaft in substantially horizontalposition, a grind wheel mounted upon each end of said shaft,

one grind wheel serving to effect grinding operation upon one side ofthe machine and the other grind wheel serving to effect grindmgoperatious upon the other side of the track, a motor supported b saidframe, a pair of grind wheels carrie by and located adjacent either-sideof said frame, means for connecting both said grind wheels to saidmotor, means for simultaneously shifting both said grind wheelslaterally of said track,

and means for vertically adjusting each grind wheel with respect to thetrack.

In testimony whereof, we have hereunto 7 set our hands.

FREDERICK L. RE QUA. ARION S. KALENBORN.

' machine, and motive means for driving said 7 shaft. a

11. A rail grinder comprising a wheeled frame adapted to operate upon arailed track, a carriage mounted upon said frame, said carriage beingfreely shiftable transversely of the frame responsive to direct manualthrust applied to the carriage, a pair of grind,

wheels'supported by said carriage adjacent either side of the same, andmeans for effecting vertical adjustment of said grind wheels, said meansincluding a pair of manu'al control members carried by said carriage andadjacent either side of the same, whereby an operator can laterally andvertically adjust 'a grind wheel by actuating one of said controlmembers.

12. A rail grinder comprising a wheeled frame adapted to operate upon arailed

